I purchased this bubbleback. Here are the photos of the watch. I took a gamble and bought it. Now, I am worried. The dial seems to be refinished. The caseback reference is a 3135 and judging by the serial number it dates it to 1938. The case looks too perfect meaning the bezel is crisp and wide. Perhaps it is an unpolished reference. Above the serial number is stamped BREVET. Thoughts? I thank you all in advance for always helping me with my questions.